A cross-flow type flow-making water pump is provided, including a motor, two impeller and impeller housings. The cross-flow type flow-making water pump further includes clamping assemblies. The clamping assemblies are used for connecting the motor with the impellers. The clamping assemblies include clamping heads and clamping seats. The clamping heads are arranged at the ends, which are connected with motor rotating shaft, of the impellers. The clamping heads include at least two clamping sheets symmetrically arranged along axial directions of the impellers. The clamping seats are respectively arranged on the motor rotating shaft in a sleeving manner. Connection between the motor rotating shaft and the impellers is realized through clamping of the clamping sheets and the clamping seats.